Excerpted from the book entitled, "Pontiac Firebird 1967-2000 Photo History" by George W. Scala
Firebird production for 1999:
Firebird 17,170
Firebird Convertible 1,245
Trans Am 13,108*
Trans Am Convertible 1,494
30th Trans Am 1,065
30th Trans Am Convertible 535
Total Production: 36,219
Formula WS-6 175**
Trans Am WS-6 2,765
Trans Am Convertible SW-6 467
*Between the Formula and the Trans Am, at the time this info was published, only 721 Firehawks were built. A fire at SLP damaged records--my book says more figures were due out later.
**Of these, 20 were the Formula 1LE (WS-6)
I hope this helps you out
Scott